Ventilator.



PATENTED AUG. 21, 1906.

R. M. DIXON. VENTILATOR.

APPLICATION FILED AUG.5, 1903.

167. INVENTOH A TTOHNE M UNITED sTAr s FTENT OFFICE.

ROBERT M. DIXON, OF EAST ORANG E, NEW JERSEY, ASSIGNOR TO THE SAFETY (JAR HEATING AND LIGHTING COMPANY, A CORPORATION OF NEW JERSEY.

VENTILATOR- Specification of Letters Patent.

Patented Aug. 21, 1906.

To all MI/LKHH/ it may concern:

Be it known that 1, ROBERT M. DIXON, a citizen of the United States, residing in East Orange, county of Essex, State of New J ersey, have invented certain new and useful Improvements in Ventilators, of which the following is a specification.

This invention relates to ventilation, and more specifically to the ventilation of vehicles.

One of the objects thereof is to provide means of simple and practical construction and thoroughly eflicient action adapted to ventilate a vehicle.

Another object is to provide means of the above type the action of which shall be uniform and well adapted for use in connection with lamps or similar devices.

Other objects will be in part obvious and in part pointed out hereinafter.

The invention accordingly consists in the features of construction, combinations of elements, and arrangement of parts, which will be exemplified in the apparatus hereinafter described and the scope of the application of which will be indicated in the following claims.

In the accompanying drawings, wherein is shown one of various possible embodiments of my invention, Figure I is a plan of the same. Fig. II is a sectional elevation taken substantially on the line II II of Fig. I.

Similar reference characters refer to similar parts throughout both views of the drawmgs.

AS conducive to a more ready understanding of this invention it may first be noted that in connection with the ventilation of cars, this term being used throughout to include vehicles of any type, there is often a tendency, on account of the movement of the car through the air, for a. back draft to occur through the ventilator, thus seriously interfering with the efficiency of this apparatus. This action not only interferes with a maximum discharge of foul air, but in the case of ventilators used in conjunction with lamps results in an irregular action of the latter, which is extremely trying to the eyes and is otherwise objectionable.

The above and other defects are eliminated in constructions of the nature of that hereinafter described.

Referring now to Fig. II of the drawings,

1 there is shown at a. a car-roof or equivalent outer wall of a vehicle, this term being used broadly throughout this specification and the following claims. Mounted upon the part i a, as by means of an annular plate I), is an uptake or deck-thimble 0, over which a ventilator-thimble d is fitted and to which it is secured. Mounted upon the latter member is the inner wall or hell e of a ventilator-hood, the outer portion of which is formed by a similar member f spaced therefrom, as by blocks g. These blocks may be riveted in place, as shown at i, or otherwise secured, and the several membersmay be held in position in any desired manner, the details of the structure shown being unimportant as hearing on the broad idea of my invention.

The lower edge of the hood terminates at a point closely adjacent the plate 5 and the roof a, as shown in the drawings, and this edge may be stiffened, as by means of the band Passages are provided leading between the spaced members of the ventilatorhood, and it will thus be seen that the foul air or burnt gases passing upwardly from the car are received or deflected by the memberf and discharged adjacent the car-roof.

The operation of the above-described embodiment of my invention is substantially as follows: Assuming the ventilator to be in operative position upon the roof or wall (L and the foul air to follow the course indicated by the arrows; it will be discharged in the form of a thin sheet closely adjacent the outer surface of the vehicle. The value of this action depends largely upon the fact that I have found that there is a thin sheet or envelop of air which accompanies a vehicle in its movement through the atmosphere, traw eling substantially at the same rate. This effeet, which may be due to friction or other causes, results in a thin zone of air clinging about the outer surface of the car or vehicle, which is, broadly, substantially motionless with respect thereto. It is within this zone of air that the waste gases are discharged and dissipated, and hence any variation in draft or tendency to back discharge is obviated.

It will thus be seen that I have provided an apparatus which is of the simplest and most inexpensive construction and is well adapted to accomplish the several objects of this invention.

Lil.

As many changes could be made in the above construction and. many apparently widelydili'erent embodiments of my invcntion could be made Without departing from the scope thereof, l intend that all matter contained in the above description or shown in the accompanying drawings shall be inter i preted as illustrative and not in a limiting 1 sense.

l l l llaving described my invention, what ll claim as new, and desire to secure by .lietteru Patent, is-

1. In ear-ventilating apparatus, in eombi nation, a car-roof provided with an opening,. 1 means adapted to transmit waste gases through said opening, and means adapted to receive said waste gases from said transinitting means and discharge the same into the envelop of air resting against and substantially traveling with the car.

2. In carventilating apparatus, in combination, a car-roof provided with an opening, means adapted to transmit waste gases through said opening, and means adapted to receive said waste gases from said transinitting means and discharge the same in a thin annular sheet into the envelop of air resting against and substantially traveling with \the car. l

3. In car-ventilating apparatus, in coln bi nation, a car-roof provided with an opening, means adapted to transmit waste gases through. said opening, and means adapted to receive said waste gases from said transmitting mcans and discharge the same downwardly in a thin. annular sheet into the envelop of air resting against and substantially traveling with the car.

4. ln car-ventilating apparatus, in combination, a ear-roof provided with. an opening, means adapted to transmit waste gases upwardly through said opening, and a pair of substantially equally spaced bell shaped members adapted to receive therebetween said gases from said. transmitting means and discharge the same downwardly in. the form of a thin annular sheet into the envelop of air resting against and substantially traveling with the car.

ROBERT M. Dl XON.

W'itnesses:

F. E. KEssINGEn, ELMER E. ALLBEE. 

